30 minutes before you want to begin cooking, marinate the turkey with cornstarch and soy sauce
When ready to stir fry, put a pan over medium-high heat and add the oil. When the oil begins to smoke add the garlic and ginger, stirring vigorously. Cook until fragrant, about 20-30 seconds.
Now, add the turkey breast and stir fry until the turkey breast is 50% cooked. Then add the rest of your ingredients. Turn the temperature to high, and continuously stir until vegetables are cooked through but still have crunch. By that time your turkey should also be done. Serve immediately with steamed rice.